java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/array-memsafety/mult_array-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 05:34:32,853 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:34:32,854 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:34:32,868 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:34:32,869 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:34:32,870 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:34:32,871 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:34:32,873 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:34:32,875 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:34:32,876 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:34:32,877 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:34:32,877 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:34:32,878 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:34:32,880 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:34:32,881 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:34:32,883 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:34:32,885 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:34:32,888 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:34:32,889 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:34:32,890 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:34:32,893 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 05:34:32,893 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 05:34:32,893 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 05:34:32,894 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 05:34:32,895 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 05:34:32,897 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 05:34:32,897 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 05:34:32,898 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 05:34:32,898 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 05:34:32,898 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 05:34:32,899 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 05:34:32,899 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-21 05:34:32,909 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:34:32,909 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:34:32,910 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:34:32,910 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:34:32,910 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:34:32,910 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:34:32,910 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:34:32,911 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:34:32,911 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:34:32,911 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:34:32,911 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:34:32,911 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:34:32,912 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:34:32,912 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:34:32,912 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:34:32,912 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:34:32,912 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:34:32,912 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:34:32,912 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:34:32,912 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:34:32,913 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:34:32,913 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:34:32,913 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:34:32,913 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:34:32,913 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:34:32,914 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:34:32,914 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:34:32,914 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:34:32,914 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:34:32,914 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:34:32,914 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:34:32,914 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:34:32,915 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:34:32,915 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:34:32,915 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:34:32,915 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:34:32,915 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:34:32,916 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:34:32,916 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:34:32,949 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:34:32,959 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:34:32,963 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:34:32,964 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:34:32,964 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:34:32,965 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/mult_array-alloca_true-valid-memsafety_true-termination.i [2018-01-21 05:34:33,140 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:34:33,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:34:33,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:34:33,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:34:33,151 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:34:33,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:34:33" (1/1) ... [2018-01-21 05:34:33,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@719878db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:33, skipping insertion in model container [2018-01-21 05:34:33,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:34:33" (1/1) ... [2018-01-21 05:34:33,170 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:34:33,222 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:34:33,342 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:34:33,359 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:34:33,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:33 WrapperNode [2018-01-21 05:34:33,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:34:33,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:34:33,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:34:33,369 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:34:33,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:33" (1/1) ... [2018-01-21 05:34:33,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:33" (1/1) ... [2018-01-21 05:34:33,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:33" (1/1) ... [2018-01-21 05:34:33,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:33" (1/1) ... [2018-01-21 05:34:33,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:33" (1/1) ... [2018-01-21 05:34:33,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:33" (1/1) ... [2018-01-21 05:34:33,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:33" (1/1) ... [2018-01-21 05:34:33,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:34:33,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:34:33,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:34:33,405 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:34:33,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:33" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:34:33,456 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:34:33,457 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:34:33,457 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:34:33,457 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 05:34:33,457 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 05:34:33,457 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:34:33,457 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:34:33,457 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:34:33,458 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 05:34:33,458 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:34:33,458 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:34:33,458 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:34:33,661 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:34:33,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:34:33 BoogieIcfgContainer [2018-01-21 05:34:33,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:34:33,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:34:33,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:34:33,665 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:34:33,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:34:33" (1/3) ... [2018-01-21 05:34:33,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548ad49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:34:33, skipping insertion in model container [2018-01-21 05:34:33,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:33" (2/3) ... [2018-01-21 05:34:33,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548ad49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:34:33, skipping insertion in model container [2018-01-21 05:34:33,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:34:33" (3/3) ... [2018-01-21 05:34:33,668 INFO L105 eAbstractionObserver]: Analyzing ICFG mult_array-alloca_true-valid-memsafety_true-termination.i [2018-01-21 05:34:33,675 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:34:33,682 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 05:34:33,728 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:34:33,728 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:34:33,728 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:34:33,728 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:34:33,728 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:34:33,728 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:34:33,728 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:34:33,729 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:34:33,729 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:34:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 05:34:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:34:33,753 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:33,754 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:34:33,754 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:34:33,758 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-21 05:34:33,761 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:33,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:33,808 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:33,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:33,808 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:34:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:34:33,864 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:34:33,872 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:34:33,879 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:34:33,880 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:34:33,880 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:34:33,880 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:34:33,880 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:34:33,880 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:34:33,880 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:34:33,881 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:34:33,881 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:34:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 05:34:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 05:34:33,885 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:33,885 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:34:33,885 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:34:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1756096489, now seen corresponding path program 1 times [2018-01-21 05:34:33,886 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:33,887 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:33,887 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:33,887 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:33,887 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:33,908 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 05:34:33,908 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 05:34:33,908 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 05:34:33,919 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:33,919 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 05:34:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:33,969 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 05:34:33,971 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 05:34:33,971 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:34:33,971 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-01-21 05:34:33,980 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:33,980 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 05:34:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:34,024 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:34:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:34:34,189 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:34:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:34:34,250 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:34:34,250 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2018-01-21 05:34:34,250 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:34:34,253 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 05:34:34,337 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 05:34:34,338 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 05:34:34,340 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2018-01-21 05:34:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:34:34,476 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 05:34:34,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 05:34:34,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-01-21 05:34:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:34:34,488 INFO L225 Difference]: With dead ends: 60 [2018-01-21 05:34:34,488 INFO L226 Difference]: Without dead ends: 35 [2018-01-21 05:34:34,491 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-01-21 05:34:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-21 05:34:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-21 05:34:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-21 05:34:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-01-21 05:34:34,529 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 21 [2018-01-21 05:34:34,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:34:34,529 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-01-21 05:34:34,530 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 05:34:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-01-21 05:34:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 05:34:34,531 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:34,531 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:34:34,531 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:34:34,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1252120768, now seen corresponding path program 1 times [2018-01-21 05:34:34,532 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:34,533 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:34,533 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:34,533 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:34,533 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:34,546 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 05:34:34,546 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 05:34:34,546 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 05:34:34,555 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:34,555 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 05:34:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:34,591 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 05:34:34,591 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 05:34:34,591 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:34:34,591 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 05:34:34,597 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:34,597 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:34:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:34,619 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:34:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:34:34,642 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:34:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:34:34,700 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:34:34,700 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2018-01-21 05:34:34,700 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:34:34,701 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:34:34,701 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:34:34,701 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:34:34,701 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 4 states. [2018-01-21 05:34:34,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:34:34,792 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2018-01-21 05:34:34,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 05:34:34,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-01-21 05:34:34,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:34:34,794 INFO L225 Difference]: With dead ends: 56 [2018-01-21 05:34:34,794 INFO L226 Difference]: Without dead ends: 40 [2018-01-21 05:34:34,795 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:34:34,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-21 05:34:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2018-01-21 05:34:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-21 05:34:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-21 05:34:34,802 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2018-01-21 05:34:34,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:34:34,803 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-21 05:34:34,803 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:34:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-21 05:34:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 05:34:34,804 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:34,804 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:34:34,805 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:34:34,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1880809997, now seen corresponding path program 1 times [2018-01-21 05:34:34,805 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:34,806 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:34,806 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:34,807 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:34,807 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:34,817 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 05:34:34,817 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 05:34:34,817 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 05:34:34,826 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:34,826 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 05:34:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:34,859 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 05:34:34,861 INFO L201 CegarAbsIntRunner]: [0], [1], [6], [7], [10], [14], [17], [21], [22], [23], [24], [32], [36], [39], [41], [42], [43], [45], [49], [53], [56], [67], [68], [69], [70], [71], [72], [74], [75], [76], [77] [2018-01-21 05:34:34,913 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:34:34,913 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 05:34:46,023 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 05:34:46,030 INFO L268 AbstractInterpreter]: Visited 31 different actions 47 times. Merged at 15 different actions 15 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 27 variables. [2018-01-21 05:34:46,072 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 05:34:46,072 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:34:46,072 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 05:34:46,079 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:46,079 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:34:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:46,100 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:34:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:34:46,127 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:34:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:34:46,308 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:34:46,308 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-01-21 05:34:46,308 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:34:46,309 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:34:46,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:34:46,309 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 05:34:46,309 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 5 states. [2018-01-21 05:34:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:34:46,413 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2018-01-21 05:34:46,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:34:46,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 05:34:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:34:46,417 INFO L225 Difference]: With dead ends: 102 [2018-01-21 05:34:46,417 INFO L226 Difference]: Without dead ends: 93 [2018-01-21 05:34:46,418 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 05:34:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-01-21 05:34:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2018-01-21 05:34:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 05:34:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-21 05:34:46,427 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2018-01-21 05:34:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:34:46,428 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-21 05:34:46,428 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:34:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-21 05:34:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 05:34:46,429 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:46,429 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:34:46,430 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:34:46,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2014823503, now seen corresponding path program 1 times [2018-01-21 05:34:46,430 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:46,431 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:46,431 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:46,432 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:46,432 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:46,439 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 05:34:46,439 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 05:34:46,439 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 05:34:46,449 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:46,449 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 05:34:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:46,483 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 05:34:46,483 INFO L201 CegarAbsIntRunner]: [0], [1], [6], [7], [10], [14], [19], [21], [22], [23], [24], [32], [36], [39], [41], [42], [43], [45], [49], [53], [56], [67], [68], [69], [70], [71], [72], [74], [75], [76], [77] [2018-01-21 05:34:46,485 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:34:46,485 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 05:34:52,646 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 05:34:52,646 INFO L268 AbstractInterpreter]: Visited 31 different actions 47 times. Merged at 15 different actions 15 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 27 variables. [2018-01-21 05:34:52,653 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 05:34:52,654 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:34:52,654 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 05:34:52,659 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:52,659 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:34:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:52,675 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:34:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:34:52,698 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:34:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:34:52,823 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:34:52,823 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-01-21 05:34:52,824 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:34:52,824 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:34:52,824 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:34:52,824 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 05:34:52,824 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 5 states. [2018-01-21 05:34:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:34:52,872 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-01-21 05:34:52,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:34:52,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 05:34:52,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:34:52,874 INFO L225 Difference]: With dead ends: 95 [2018-01-21 05:34:52,874 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 05:34:52,875 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 05:34:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 05:34:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2018-01-21 05:34:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 05:34:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-21 05:34:52,882 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2018-01-21 05:34:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:34:52,883 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-21 05:34:52,883 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:34:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-21 05:34:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 05:34:52,884 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:52,884 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:34:52,884 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:34:52,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1818770383, now seen corresponding path program 1 times [2018-01-21 05:34:52,885 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:52,886 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:52,886 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:52,886 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:52,886 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:52,892 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 05:34:52,893 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 05:34:52,893 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 05:34:52,900 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:52,901 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 05:34:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:52,940 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 05:34:52,940 INFO L201 CegarAbsIntRunner]: [0], [1], [6], [7], [12], [14], [17], [21], [22], [23], [24], [32], [36], [39], [41], [42], [43], [45], [49], [53], [56], [67], [68], [69], [70], [71], [72], [74], [75], [76], [77] [2018-01-21 05:34:52,942 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:34:52,942 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 05:34:56,903 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 05:34:56,904 INFO L268 AbstractInterpreter]: Visited 31 different actions 47 times. Merged at 15 different actions 15 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 27 variables. [2018-01-21 05:34:56,906 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 05:34:56,906 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:34:56,906 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 05:34:56,911 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:56,911 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:34:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:56,925 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:34:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:34:56,944 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:34:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:34:56,993 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:34:56,994 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2018-01-21 05:34:56,994 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:34:56,994 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:34:56,994 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:34:56,994 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 05:34:56,995 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 5 states. [2018-01-21 05:34:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:34:57,042 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2018-01-21 05:34:57,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:34:57,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 05:34:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:34:57,043 INFO L225 Difference]: With dead ends: 110 [2018-01-21 05:34:57,043 INFO L226 Difference]: Without dead ends: 101 [2018-01-21 05:34:57,044 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 05:34:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-01-21 05:34:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 54. [2018-01-21 05:34:57,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 05:34:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-21 05:34:57,051 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2018-01-21 05:34:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:34:57,052 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-21 05:34:57,052 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:34:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-21 05:34:57,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 05:34:57,053 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:57,053 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:34:57,053 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:34:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1952783889, now seen corresponding path program 1 times [2018-01-21 05:34:57,054 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:57,054 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:57,055 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:57,055 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:57,055 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:57,061 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 05:34:57,062 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 05:34:57,062 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 05:34:57,077 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:57,078 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 05:34:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:57,121 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 05:34:57,121 INFO L201 CegarAbsIntRunner]: [0], [1], [6], [7], [12], [14], [19], [21], [22], [23], [24], [32], [36], [39], [41], [42], [43], [45], [49], [53], [56], [67], [68], [69], [70], [71], [72], [74], [75], [76], [77] [2018-01-21 05:34:57,122 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:34:57,122 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 05:35:00,592 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 05:35:00,593 INFO L268 AbstractInterpreter]: Visited 31 different actions 47 times. Merged at 15 different actions 15 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 27 variables. [2018-01-21 05:35:00,599 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 05:35:00,600 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:35:00,600 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 05:35:00,605 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:00,605 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:35:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:00,620 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:35:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:35:00,638 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:35:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:35:00,703 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:35:00,703 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2018-01-21 05:35:00,703 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:35:00,703 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:35:00,704 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:35:00,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 05:35:00,704 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 5 states. [2018-01-21 05:35:00,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:35:00,746 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-01-21 05:35:00,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:35:00,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 05:35:00,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:35:00,747 INFO L225 Difference]: With dead ends: 69 [2018-01-21 05:35:00,747 INFO L226 Difference]: Without dead ends: 60 [2018-01-21 05:35:00,748 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 05:35:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-21 05:35:00,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2018-01-21 05:35:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 05:35:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-01-21 05:35:00,754 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2018-01-21 05:35:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:35:00,754 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-01-21 05:35:00,755 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:35:00,755 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-01-21 05:35:00,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-21 05:35:00,755 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:00,756 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:35:00,756 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:35:00,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1166525403, now seen corresponding path program 1 times [2018-01-21 05:35:00,756 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:00,757 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:00,757 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:00,758 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:00,758 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:00,765 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 05:35:00,765 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 05:35:00,765 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 05:35:00,770 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:00,770 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 05:35:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:35:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:35:00,835 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:35:00,843 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:35:00,850 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:35:00,851 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:35:00,866 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:35:00,866 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:35:00,866 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:35:00,866 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:35:00,866 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:35:00,866 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:35:00,867 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:35:00,867 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 05:35:00,867 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:35:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 05:35:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 05:35:00,869 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:00,869 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:35:00,869 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 05:35:00,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2112136767, now seen corresponding path program 1 times [2018-01-21 05:35:00,869 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:00,870 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:00,870 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:00,870 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:00,871 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:00,876 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 05:35:00,877 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 05:35:00,877 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 05:35:00,885 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:00,885 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 05:35:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:00,912 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 05:35:00,912 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 05:35:00,912 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:35:00,912 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 05:35:00,918 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:00,919 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:35:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:00,931 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:35:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:35:00,950 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:35:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:35:00,992 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:35:00,993 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2018-01-21 05:35:00,993 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:35:00,993 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 05:35:00,993 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 05:35:00,993 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 05:35:00,994 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2018-01-21 05:35:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:35:01,032 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 05:35:01,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 05:35:01,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-01-21 05:35:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:35:01,033 INFO L225 Difference]: With dead ends: 60 [2018-01-21 05:35:01,033 INFO L226 Difference]: Without dead ends: 33 [2018-01-21 05:35:01,033 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-01-21 05:35:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-21 05:35:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-21 05:35:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-21 05:35:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2018-01-21 05:35:01,037 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2018-01-21 05:35:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:35:01,037 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2018-01-21 05:35:01,037 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 05:35:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2018-01-21 05:35:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 05:35:01,038 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:01,038 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:35:01,038 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 05:35:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash 197950760, now seen corresponding path program 1 times [2018-01-21 05:35:01,039 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:01,039 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:01,039 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:01,039 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:01,040 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:01,044 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 05:35:01,044 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 05:35:01,045 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 05:35:01,056 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:01,056 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 05:35:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:01,096 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 05:35:01,096 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 05:35:01,096 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:35:01,096 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 05:35:01,104 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:01,104 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:35:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:01,123 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:35:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:35:01,179 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:35:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:35:01,229 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:35:01,229 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2018-01-21 05:35:01,229 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:35:01,229 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:35:01,229 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:35:01,229 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:35:01,230 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 4 states. [2018-01-21 05:35:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:35:01,249 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2018-01-21 05:35:01,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 05:35:01,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-01-21 05:35:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:35:01,251 INFO L225 Difference]: With dead ends: 52 [2018-01-21 05:35:01,251 INFO L226 Difference]: Without dead ends: 38 [2018-01-21 05:35:01,251 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:35:01,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-21 05:35:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2018-01-21 05:35:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-21 05:35:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-01-21 05:35:01,254 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 25 [2018-01-21 05:35:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:35:01,254 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-01-21 05:35:01,254 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:35:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-01-21 05:35:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 05:35:01,255 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:01,255 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:35:01,255 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 05:35:01,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1753910501, now seen corresponding path program 1 times [2018-01-21 05:35:01,255 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:01,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:01,256 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:01,256 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:01,256 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:01,261 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 05:35:01,261 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 05:35:01,261 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 05:35:01,267 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:01,267 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 05:35:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:01,296 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-01-21 05:35:01,330 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [10], [14], [17], [21], [22], [23], [24], [32], [36], [39], [41], [42], [43], [45], [49], [53], [56], [67], [68], [69], [70], [71], [73], [74], [75], [76] [2018-01-21 05:35:01,331 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:35:01,331 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 05:35:04,319 INFO L262 AbstractInterpreter]: Error location(s) were unreachable [2018-01-21 05:35:04,319 INFO L268 AbstractInterpreter]: Visited 29 different actions 44 times. Merged at 14 different actions 14 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 27 variables. [2018-01-21 05:35:04,322 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-01-21 05:35:20,223 INFO L232 lantSequenceWeakener]: Weakened 29 states. On average, predicates are now at 64.25% of their original sizes. [2018-01-21 05:35:20,224 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-01-21 05:35:20,629 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-01-21 05:35:20,630 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:35:20,631 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-01-21 05:35:20,631 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:35:20,631 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-21 05:35:20,631 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-21 05:35:20,631 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-01-21 05:35:20,632 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 17 states. [2018-01-21 05:35:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:35:31,096 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-01-21 05:35:31,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-21 05:35:31,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-01-21 05:35:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:35:31,096 INFO L225 Difference]: With dead ends: 63 [2018-01-21 05:35:31,097 INFO L226 Difference]: Without dead ends: 56 [2018-01-21 05:35:31,097 INFO L525 BasicCegarLoop]: 2 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2018-01-21 05:35:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-21 05:35:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2018-01-21 05:35:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-21 05:35:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-01-21 05:35:31,104 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 30 [2018-01-21 05:35:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:35:31,104 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-01-21 05:35:31,104 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-21 05:35:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-01-21 05:35:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 05:35:31,105 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:31,105 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:35:31,105 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 05:35:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1535055783, now seen corresponding path program 1 times [2018-01-21 05:35:31,105 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:31,106 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:31,106 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:31,106 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:31,107 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:31,113 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 05:35:31,113 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 05:35:31,113 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 05:35:31,129 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:31,129 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 05:35:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:31,171 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-01-21 05:35:31,171 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [10], [14], [19], [21], [22], [23], [24], [32], [36], [39], [41], [42], [43], [45], [49], [53], [56], [67], [68], [69], [70], [71], [73], [74], [75], [76] [2018-01-21 05:35:31,172 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:35:31,172 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-01-21 05:35:33,252 WARN L571 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-01-21 05:35:33,253 WARN L157 AbstractInterpreter]: Abstract interpretation run out of time [2018-01-21 05:35:33,253 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 05:35:33,253 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:35:33,253 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 05:35:33,260 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:33,260 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:35:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:33,273 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:35:33,276 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-21 05:35:33,276 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 05:35:33,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 05:35:33 BoogieIcfgContainer [2018-01-21 05:35:33,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 05:35:33,279 INFO L168 Benchmark]: Toolchain (without parser) took 60138.31 ms. Allocated memory was 299.9 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 258.8 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 759.6 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:33,279 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 299.9 MB. Free memory is still 264.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 05:35:33,280 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.61 ms. Allocated memory is still 299.9 MB. Free memory was 258.8 MB in the beginning and 248.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:33,280 INFO L168 Benchmark]: Boogie Preprocessor took 36.26 ms. Allocated memory is still 299.9 MB. Free memory was 248.9 MB in the beginning and 246.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:33,280 INFO L168 Benchmark]: RCFGBuilder took 257.33 ms. Allocated memory is still 299.9 MB. Free memory was 246.9 MB in the beginning and 229.9 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:33,280 INFO L168 Benchmark]: TraceAbstraction took 59615.50 ms. Allocated memory was 299.9 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 229.9 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 730.7 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:33,282 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 299.9 MB. Free memory is still 264.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 222.61 ms. Allocated memory is still 299.9 MB. Free memory was 258.8 MB in the beginning and 248.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.26 ms. Allocated memory is still 299.9 MB. Free memory was 248.9 MB in the beginning and 246.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 257.33 ms. Allocated memory is still 299.9 MB. Free memory was 246.9 MB in the beginning and 229.9 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 59615.50 ms. Allocated memory was 299.9 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 229.9 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 730.7 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 30 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 403 LocStat_NO_SUPPORTING_DISEQUALITIES : 70 LocStat_NO_DISJUNCTIONS : -60 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 35 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 46 TransStat_NO_SUPPORTING_DISEQUALITIES : 13 TransStat_NO_DISJUNCTIONS : 38 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 4.477669 RENAME_VARIABLES(MILLISECONDS) : 0.019128 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 4.192004 PROJECTAWAY(MILLISECONDS) : 78.292806 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.082698 DISJOIN(MILLISECONDS) : 1.601468 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.041702 ADD_EQUALITY(MILLISECONDS) : 0.029836 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.012439 #CONJOIN_DISJUNCTIVE : 77 #RENAME_VARIABLES : 141 #UNFREEZE : 0 #CONJOIN : 121 #PROJECTAWAY : 116 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 13 #RENAME_VARIABLES_DISJUNCTIVE : 138 #ADD_EQUALITY : 44 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 7 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 30 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 423 LocStat_NO_SUPPORTING_DISEQUALITIES : 70 LocStat_NO_DISJUNCTIONS : -60 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 35 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 47 TransStat_NO_SUPPORTING_DISEQUALITIES : 13 TransStat_NO_DISJUNCTIONS : 38 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 3.598777 RENAME_VARIABLES(MILLISECONDS) : 0.012350 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 3.436106 PROJECTAWAY(MILLISECONDS) : 80.510503 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.049029 DISJOIN(MILLISECONDS) : 1.513364 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.025419 ADD_EQUALITY(MILLISECONDS) : 0.015117 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.014111 #CONJOIN_DISJUNCTIVE : 77 #RENAME_VARIABLES : 141 #UNFREEZE : 0 #CONJOIN : 121 #PROJECTAWAY : 116 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 13 #RENAME_VARIABLES_DISJUNCTIVE : 138 #ADD_EQUALITY : 45 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 7 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 30 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 425 LocStat_NO_SUPPORTING_DISEQUALITIES : 70 LocStat_NO_DISJUNCTIONS : -60 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 35 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 47 TransStat_NO_SUPPORTING_DISEQUALITIES : 13 TransStat_NO_DISJUNCTIONS : 38 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 2.444914 RENAME_VARIABLES(MILLISECONDS) : 0.011316 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 2.313550 PROJECTAWAY(MILLISECONDS) : 85.466544 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.065531 DISJOIN(MILLISECONDS) : 1.564313 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.022155 ADD_EQUALITY(MILLISECONDS) : 0.013514 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.010996 #CONJOIN_DISJUNCTIVE : 77 #RENAME_VARIABLES : 141 #UNFREEZE : 0 #CONJOIN : 121 #PROJECTAWAY : 116 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 13 #RENAME_VARIABLES_DISJUNCTIVE : 138 #ADD_EQUALITY : 45 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 7 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 30 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 445 LocStat_NO_SUPPORTING_DISEQUALITIES : 70 LocStat_NO_DISJUNCTIONS : -60 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 35 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 48 TransStat_NO_SUPPORTING_DISEQUALITIES : 13 TransStat_NO_DISJUNCTIONS : 38 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 2.905159 RENAME_VARIABLES(MILLISECONDS) : 0.015443 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 2.703766 PROJECTAWAY(MILLISECONDS) : 108.809351 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.052886 DISJOIN(MILLISECONDS) : 1.527908 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.031948 ADD_EQUALITY(MILLISECONDS) : 0.012828 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.012447 #CONJOIN_DISJUNCTIVE : 77 #RENAME_VARIABLES : 141 #UNFREEZE : 0 #CONJOIN : 121 #PROJECTAWAY : 116 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 13 #RENAME_VARIABLES_DISJUNCTIVE : 138 #ADD_EQUALITY : 46 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 7 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 27 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 364 LocStat_NO_SUPPORTING_DISEQUALITIES : 66 LocStat_NO_DISJUNCTIONS : -54 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 33 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 44 TransStat_NO_SUPPORTING_DISEQUALITIES : 13 TransStat_NO_DISJUNCTIONS : 36 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.339054 RENAME_VARIABLES(MILLISECONDS) : 1.214817 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.318919 PROJECTAWAY(MILLISECONDS) : 53.657706 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.083264 DISJOIN(MILLISECONDS) : 1.564549 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 1.238180 ADD_EQUALITY(MILLISECONDS) : 0.055939 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.045663 #CONJOIN_DISJUNCTIVE : 73 #RENAME_VARIABLES : 124 #UNFREEZE : 0 #CONJOIN : 105 #PROJECTAWAY : 93 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 12 #RENAME_VARIABLES_DISJUNCTIVE : 121 #ADD_EQUALITY : 42 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 7 * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 3 procedures, 42 locations, 3 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L541] int i, j; [L542] int length = __VERIFIER_nondet_int(); [L543] COND TRUE length < 1 || length >= 2147483647 / sizeof(int) [L543] length = 1 VAL [length=1] [L544] int fac = __VERIFIER_nondet_int(); [L545] COND TRUE fac < 1 || fac >= 2147483647 / (sizeof(int) * length) [L545] fac = 1 VAL [fac=1, length=1] [L546] EXPR, FCALL __builtin_alloca (length*sizeof(int)) VAL [__builtin_alloca (length*sizeof(int))={7:0}, fac=1, length=1] [L546] int *arr = __builtin_alloca (length*sizeof(int)); VAL [__builtin_alloca (length*sizeof(int))={7:0}, arr={7:0}, fac=1, length=1] [L547] EXPR, FCALL __builtin_alloca (fac*length*sizeof(int)) VAL [__builtin_alloca (fac*length*sizeof(int))={9:0}, __builtin_alloca (length*sizeof(int))={7:0}, arr={7:0}, fac=1, length=1] [L547] int *arr2 = __builtin_alloca (fac*length*sizeof(int)); VAL [__builtin_alloca (fac*length*sizeof(int))={9:0}, __builtin_alloca (length*sizeof(int))={7:0}, arr={7:0}, arr2={9:0}, fac=1, length=1] [L548] COND FALSE !(!arr || !arr2) [L549] i=0 VAL [__builtin_alloca (fac*length*sizeof(int))={9:0}, __builtin_alloca (length*sizeof(int))={7:0}, arr={7:0}, arr2={9:0}, fac=1, i=0, length=1] [L549] COND TRUE i